kube-bench を Homebrew, Nix でインストール

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• kube-bench

プロジェクトの歴史

The aquasecurity/kube-bench repository was created on 2017-06-19, during the period when Kubernetes security hardening was moving from ad hoc guidance into repeatable benchmark checks. The README states that kube-bench implements the CIS Kubernetes Benchmark as closely as possible and asks users to distinguish tool bugs from benchmark issues.

The project architecture deliberately keeps test definitions in YAML files so they can change as benchmark specifications evolve. That design let kube-bench follow new Kubernetes versions, managed-service variants, OpenShift profiles, k3s/RKE/RKE2 profiles, and STIG/hardening-guide sources without rewriting the executable for every control set.

採用の歴史

kube-bench became one of the standard open source ways to run CIS checks against Kubernetes. Its README documents multiple execution modes, including running directly on a host, running inside a pod or job, and using Docker images, while package managers such as Homebrew and Nix made the binary available for local installation.

Aqua later connected the same benchmark-checking idea to Trivy and Trivy Operator. The kube-bench README states that both Trivy CLI and Trivy Operator support CIS Kubernetes Benchmark scanning, and Aqua's Starboard/Trivy-era material shows kube-bench checks being pulled into broader cloud-native security workflows.

使われ方

kube-bench can run as a Kubernetes Job and inspect logs for results, but host-level checks require access to process namespaces and host configuration directories. By default it chooses a test set based on the Kubernetes version, while the documented platform matrix maps CIS, STIG, and hardening-guide sources to kube-bench config names.

パッケージ好きにとっての重要性

For package nerds, kube-bench is the rare CLI where packaging, data files, and compliance semantics are inseparable. Shipping the right binary is not enough; the package also needs the benchmark configuration tree that maps security-control documents to concrete filesystem, API, and process checks.

タイムライン

• 2017-06-19: aquasecurity/kube-bench repository created on GitHub.
• 2022-10-16: kube-bench v0.6.10 announcement listed EKS Benchmark v1.1.0 and k3s CIS-1.6 support.
• 2023-04-29: Aqua announced Kubernetes CIS benchmark scanning availability in Trivy in a kube-bench GitHub discussion.
• 2025-2026: kube-bench docs mapped CIS Kubernetes Benchmark configs through 1.12, plus GKE, EKS, AKS, ACK, OpenShift, k3s, RKE, RKE2, TKGI, and STIG profiles.

Related projects

• kube-bench is related to the CIS Kubernetes Benchmark, CIS Workbench, Aqua Trivy, Trivy Operator, Starboard Operator, Kubernetes hardening guides, managed Kubernetes service benchmarks, and OpenShift security baselines.

ソース

• https://api.github.com/repos/aquasecurity/kube-bench
• https://github.com/aquasecurity/kube-bench
• https://github.com/aquasecurity/kube-bench/discussions/1307
• https://github.com/aquasecurity/kube-bench/discussions/1432
• https://raw.githubusercontent.com/aquasecurity/kube-bench/main/README.md
• https://raw.githubusercontent.com/aquasecurity/kube-bench/main/docs/platforms.md
• https://www.aquasec.com/blog/automate-kubernetes-compliance/
• https://www.cisecurity.org/benchmark/kubernetes/